A ceiling projector mount, designed to use an existing can light for power and support.
I designed this to work with the Epson EF12 projector (4.7lbs), however other VESA 75 devices should also work fine, as long as your can light can support the weight.
I used the https://www.amazon.com/dp/B002DN6QX2 Light Bulb Socket to Outlet Adapter to provide power, and have a space for storing a power brick.
Best of all, this design requires no modifications - including no nails or screws into walls / ceilings - so it is suitable for rentals.
The author remixed this model.
Added a Can Light adapter and slot for Light Bulb Socket to Outlet Adapter, for use within a recessed ceiling light. I then scaled the VESA 75 adapter vertically from the original 9mm to 15mm, as initial 9mm height bent under weight in the first week of use.